Euro Flow Control
A300 Slow Control Check Valve5 of 30 control valvesA500 Pressure Relief / Sustaining Valve
Control Valve
Part of the A900 modular system

A400 Flow Control Valve

Datasheet

Download datasheet (PDF)

Specifications are indicative. Final specification is confirmed at quotation.

Specifications

Confirmed at quote
Size Range
DN50 to DN800
Pressure Class
PN10, PN16, PN25
End connection
Flanged
Operating temperature
-10°C to 80°C

Standards

Design & manufacture
EN 1074-5, BS EN 1074-5
Inspection & test
ISO 5208, BS EN 12266-1
Face to face
BS EN 558-1

Configure your variant(manually adjust box on the right if you require a different spec)

Size
Pressure
End connection

Materials

All available material options per part. Click a pill to set it in the configurator.

Body
Bonnet
Seat
Stem
O-Ring
Spring
Bolt
Bush
Cap
Caulking Nut
Diaphragm
Disc Holder
Eye Bolts
Fix Washer
Fixing Holder
Pilot Adjusting Screw
Pilot Body
Pilot Bonnet
Pilot Cap
Pilot Diaphragm
Pilot Disc
Pilot Fixing Holder
Pilot Gasket
Pilot Jam Nut
Pilot Nut
Pilot O Ring
Pilot Plug
Pilot Screw
Pilot Spring
Pilot Spring Table
Pilot Stem
Plug
Screw
Seal
Seal Retainer
Seat Retainer
Washer
Dimensions per size(16 sizes)
SizeL (mm)H (mm)OD PN10 (mm)OD PN16 (mm)OD PN25 (mm)OK PN10 (mm)OK PN16 (mm)OK PN25 (mm)N-Od PN10 (mm)N-Od PN16 (mm)N-Od PN25 (mm)OB PN10 (mm)OB PN16 (mm)OB PN25 (mm)Model CodeWeight
DN502301771651651651251251254-Ø194-Ø194-Ø19999999A900-0050
—
DN652902021851851851451451454-Ø194-Ø198-Ø19118118118A900-0065
—
DN803102192002002001601601608-Ø198-Ø198-Ø19132132132A900-0080
—
DN1003502432202202351801801908-Ø198-Ø198-Ø23156156156A900-0100
—
DN1254002432502502702102102208-Ø198-Ø198-Ø28156156156A900-0125
—
DN1504803332852853002402402508-Ø238-Ø238-Ø28211211211A900-0150
—
DN2006004283403403602952953108-Ø2312-Ø2312-Ø28266266274A900-0200
—
DN25073047840540542535035537012-Ø2312-Ø2812-Ø31319319330A900-0250
—
DN30085053846046048540041043012-Ø2312-Ø2816-Ø31370370389A900-0300
—
DN35098055052052055546047049016-Ø2316-Ø2816-Ø34429429448A900-0350
—
DN400110071058058062051552555016-Ø2816-Ø3116-Ø37480480503A900-0400
—
DN450120072064064067056558560020-Ø2820-Ø3120-Ø37530548548A900-0450
—
DN500125082271571573062065066020-Ø2820-Ø3420-Ø37582609609A900-0500
—
DN600145088584084084572577077020-Ø3120-Ø3720-Ø40682720720A900-0600
—
DN700165091091091096084084087524-Ø3124-Ø3724-Ø43682720720A900-0700
—
DN8001850126010251025108595095099024-Ø3424-Ø4024-Ø49901901928A900-0800
—

* DN125 and DN350 use the same internals as DN100 and DN300 respectively.

* DN450 and DN700 use the same internals as DN400 and DN600 respectively.

* AISI 304 is the factory standard stainless steel grade; consult the factory for AISI 316.

Bill of materials
RefComponentMaterial
1Main valveGJS 500-7
2Needle valveSUS304
3P400 flow rate control pilotSUS304
4Ball valveSUS304
5Orifice kitSUS304
6StrainerSUS304
Technical drawings(4 pages)

Operating media

Water

Typical applications

  • Flow limiting
  • Bulk supply metering bypass
  • Distribution network control

Approvals

WRASISO 9001

Features

  • The A400 maintains a pre-set maximum flow rate regardless of upstream pressure variation
  • A flow control pilot measures differential pressure across an integral orifice and modulates the main valve to limit flow to the set value
  • Used to prevent excess draw from transmission mains, control bulk meter bypass flows and protect distribution networks from demand surges
  • Top and seat ring guided stem and diaphragm assembly for long life and reliability
  • All iron components are fusion epoxy bonded for corrosion resistance
  • Easy maintenance without removal from the main line
  • Nylon reinforced diaphragm for long-term service
  • Drip-tight shut-off
  • Globe design for superior control characteristics
  • Ductile iron bodies for higher strength and durability
  • Corrosion-resistant stainless steel seat and disc retainer ring
  • Various pilots and accessories available for configuration into many different applications
  • Special V-Port and double chamber are options, consult factory

Description

The A400 is a flow limiting configuration of the A900 main valve body, fitted with a P400 flow control pilot and Alpine orifice plate. The pilot measures differential pressure across the orifice and modulates the main valve to limit flow to the pre-set value regardless of upstream pressure variation. Used to prevent excess draw from transmission mains, control bulk meter bypass flows and protect distribution networks from demand surges. The A900 body can be repiloted in the field without body replacement.

Selection notes

This control valve is supplied for flanged installation.

Sizes run DN50 to DN800, in PN10, PN16, PN25.

The body is EN-GJS-500-7.

Seat and trim options are AISI 304 and 316. The seat, not the body, usually sets the temperature and medium limit, so confirm it against the service before ordering.

Stated service media include water.

It is catalogued for Water & Wastewater.

Working temperature is -10°C to 80°C.

Built to EN 1074-5, BS EN 1074-5, BS EN 558-1, ISO 5208 and BS EN 12266-1.

Supplier remarks

  • Function is via an orifice plate with a fixed orifice and a pilot valve set to the required flow rate (source wording, more precise than the general description). Assembly diagram names: Main Valve, Needle Valve, P400, Ball Valve, Orifice Kit, Strainer. Head Loss Curve and Cavitation chart are stated as curves, not tabulated points, so not reproduced here.
  • Ordering code structure: AXXX-SSSS-PP-YYY (Model-Size in mm-Pressure rating code-Special code). Pressure rating codes: 10=PN10, 16=PN16, 25=PN25, A1=ANSI 125 F/F, A5=ANSI 150 R/F. Special code (YYY) is assigned per configuration, consult factory.
  • P400 pilot standalone dimensions (from the combined A400 datasheet): approx. 207mm overall height, Ø140mm body diameter.

Available pressure classes

Pressure classes this product is rated to.

PN10PN16PN25

Used in

Water & Wastewater

Related guides

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A900 configurations

View full A900 system →
This product is part of the A900 modular system. All configurations share the same hydraulically operated body: the control function is set by the pilot valve(s) attached. An existing A900 body in the field can be reconfigured for a different duty simply by swapping the pilot, without replacing the body.

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DN50 to DN800

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DN50 to DN800

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DN50 to DN1000

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A14A Altitude with Rate of Flow Control Valve

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DN50 to DN1000

A205 Pressure Sustaining and Reducing Valve

DN50 to DN800

A206 Pressure Reducing Solenoid Control Valve

DN50 to DN800

A20B Pressure Reducing Valve + Low Flow Rate Bypass

DN50 to DN200

A2A5 Surge Anticipating Control Valve

DN50 to DN800

A506 Pressure Sustaining Valve with Solenoid Control

DN50 to DN800

A6DV Dual Solenoid Control Valve

DN50 to DN300

A7MD Pump Control Valve - Passive Protection

DN50 to DN800

A800 Pressure Differential Valve

DN50 to DN800

A900 Automatic Control Valve - Threaded

DN40 to DN50

R900 Main Valve - Reduced Bore

DN80 to DN1000

Pilot assembly & accessories

Pilot assembly

P400 Flow Rate Control Pilot

Flow sensing pilot: measures differential pressure across the orifice plate and modulates the main valve to hold the set flow rate

Compatible accessories

Needle Valve

Adjusts response speed and damps oscillation in the pilot circuit

Alpine Orifice Plate

Creates differential pressure signal for flow measurement

Related Control Valves

A100 Modulating Float Control Valve
Control ValveREF 344

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Type
Control Valve
Size
DN50 to DN800
Pressure
PN10, PN16, PN25
Body
EN-GJS-500-7
Standards
EN 1074-5, BS EN 1074-5
Add variant details

Adds to your quote request, not a purchase. Refine size, pressure and material before submitting.

A200 Pressure Reducing ValveControl ValveREF 345

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Type
Control Valve
Size
DN50 to DN800
Pressure
PN10, PN16, PN25
Body
EN-GJS-500-7
Standards
EN 1074-5, BS EN 1074-5
Add variant details

Adds to your quote request, not a purchase. Refine size, pressure and material before submitting.

A203 Pressure Reducing with Check ValveControl ValveREF 346

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Type
Control Valve
Size
DN50 to DN800
Pressure
PN10, PN16, PN25
Body
EN-GJS-500-7
Standards
BS EN 1074-5, BS EN 558-1
Add variant details

Adds to your quote request, not a purchase. Refine size, pressure and material before submitting.

A300 Slow Control Check ValveControl ValveREF 347

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Type
Control Valve
Size
DN50 to DN800
Pressure
PN10, PN16, PN25
Body
EN-GJS-500-7
Standards
EN 1074-5, BS EN 1074-5
Add variant details

Adds to your quote request, not a purchase. Refine size, pressure and material before submitting.